/*
 *   Licensed to the Apache Software Foundation (ASF) under one
 *   or more contributor license agreements.  See the NOTICE file
 *   distributed with this work for additional information
 *   regarding copyright ownership.  The ASF licenses this file
 *   to you under the Apache License, Version 2.0 (the
 *   "License"); you may not use this file except in compliance
 *   with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 *   Unless required by applicable law or agreed to in writing,
 *   software distributed under the License is distributed on an
 *   "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 *   KIND, either express or implied.  See the License for the
 *   specific language governing permissions and limitations
 *   under the License.
 *
 */

package org.apache.directory.server.codec.json;

import java.lang.reflect.Type;

import org.apache.directory.shared.ldap.entry.AbstractValue;
import org.apache.directory.shared.ldap.entry.BinaryValue;
import org.apache.directory.shared.ldap.entry.StringValue;
import org.apache.directory.shared.ldap.util.Base64;

import com.google.gson.JsonDeserializationContext;
import com.google.gson.JsonDeserializer;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import com.google.gson.JsonParseException;
import com.google.gson.JsonSerializationContext;
import com.google.gson.JsonSerializer;

/**
 * TODO StringValueCodec.
 *
 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
 */
public class ValueCodec implements JsonSerializer<AbstractValue<?>>, JsonDeserializer<AbstractValue<?>>
{

    public AbstractValue<?> deserialize( JsonElement element, Type typeOfT, JsonDeserializationContext context )
        throws JsonParseException
    {
        JsonObject json = element.getAsJsonObject();
        JsonElement binaryElement = json.get( "binary" );
        
        boolean isBinary = false;
        
        if( binaryElement != null )
        {
            isBinary = binaryElement.getAsBoolean();
        }
        
        String value = json.get( "value" ).getAsString();
        
        if( isBinary )
        {
            return new BinaryValue( Base64.decode( value.toCharArray() ) );
        }
        
        return new StringValue( value );
    }

    public JsonElement serialize( AbstractValue<?> src, Type typeOfSrc, JsonSerializationContext context )
    {
        JsonObject json = new JsonObject();
        
        if( src instanceof BinaryValue )
        {
            String val = String.valueOf( Base64.encode( src.getBytes() ) );
            json.addProperty( "binary", true );
            json.addProperty( "value", val );
        }
        else if( src instanceof StringValue )
        {
            json.addProperty( "value", src.getString() );
        }
        else
        {
            throw new IllegalArgumentException( "unrecogniged attribute value type " + src.getClass().getName() );
        }
            
        return json;
    }

}
